Model V-W-1 is a medium-duty Victor® compatible “E” equal or positive pressure mixer for welding, brazing and heating with all fuel gases. The mixer to tip or tip tube thread size is 23/64" - 26. Welds up to 1/2" (12.7mm) plate and heats up to 100,000 BTU. Model V-W-1 is also compatible with Victor® 100C handles